Simple categories matching ephemeral:

• notion,
• material,
• substrate,
• object,
• substance,
• knowledge,
• entity,
• source,
• thing,
• works,
• quality,
• network,
• literature,
• item,
• variety,
• change,
• content,
• matter,
• information,
• variable,
• data,
• characteristic,
• theme,
• language,
• publication,
• phenomenon,
• event,
• representation,
• process,
• structure,
• elements,
• document,
• medium,
• condition,
• program,
• writing,
• artwork,

Members with property ephemeral:

• water,
• sand,
• space,
• newspaper,
• study,
• insect,
• textile,
• photograph,
• toothpaste,
• fire,
• report,
• plum,
• comet,
• collection_inventory,
• broadcast,
• nova,
• audit_tape,
• news,
• record,
• advertising,
• letterhead,
• soil,
• exhibition,
• brochure,
• sales_catalog,
• cartoon_book,
• directory,
• letters,
• sport_fixture,
• beauty,
• bookmark,
• flyer,
• pamphlet,
• meeting,
• comic_book,
• instrument_catalog,
• video_material,
• wallpaper,
• ash,
• scrapbook,
• souvenir_program,
• internet,
• spice,
• felt,
• wealth,
• program,
• invitation,
• money,
• nylon_scrim,
• design,
• trade_catalog,
• event,
• almanac,
• concert_program,
• vegetal_fiber,
• supernova,
• wax,
• shell,
• eclipse,
• booklet,
• engraving,
• conference_papers,
• wyoming_wind,
• flood,
• stamina,
• control,
• cheesecloth,
• study_guide,
• newsletter,
• reputation,
• chalk,
• salt,
• diary,
• feelings,
• wildfire,
• trade_catalogue,
• dryer_lint,
• sticker_book,
• periodical,
• playbill,
• art,
• dirt,
• cardboard,
• auction_catalog,
• carved_trunks,
• phone_conversation,
• cast_latex,
• health_warning,
• paycheck,
• bumper_sticker,
• feather_sheath,
• tourist_guide,
• atmosphere,
• perfect_job,
• paint,
• local_newspaper,
• health_fair,
• fact_sheet,
• empathy,
• mud,
• motion,
• mercury,
• bus_transfer,
• leaf,
• conceptual_art,
• video,
• plaster,
• sky,
• news_headline,
• breaking_news,
• book,
• power,
• light,
• bark_cloth,
• maguey_leaf,
• promotional_material,
• land_art,
• magazine,
• broadside,
• brand,
• cigarette_card,
• equity_price,
• guideline,
• youth,
• job,
• pulp,
• email_message,
• salary,
• temporary_reading,
• religious_worship,
• virtual_text,
• film,
• travel_brochure,
• academic_reserve,
• pleasant_environment,
• fame,
• natural_beauty,
• relaxation,
• technical_newsletter,
• debris_flow,
• feather,
• blog,
• company,
• government,
• stick,
• junk,
• bigger_house,
• poem_card,
• lighting,
• pin,
• catalogue,
• digital_file,
• social_contact,
• thesis_item,
• fragrant_spice,
• meteoroid_impact,
• scrim,
• weather,
• greeting_card,
• volcano_eruption,
• television,
• postcard,
• storm,
• job_posting,
• life,
• traffic,
• cloud,
• music,
• annual_report,
• cartoon,
• electronic_art,
• student_publication,
• photocopy,
• theatre_program,
• soap,
• light_change,
• beeswax,
• yesterday_newspaper,
• success,
• working_papers,
• earl,
• packaging,
• art-exhibition_catalogue,
• recognition,
• sales,
• human_aspiration,
• trade_card,
• reflection,
• pleasure,
• collective_knowledge,
• reed,
• transactions,
• rock,
• guide_book,
• clear_resin,
• ticket,
• climate_oscillation,
• holiday_snap,
• graphics,
• advertisement,
• technical_report,
• book_plate,
• volcanic_eruption,
• social_network,
• details,
• love,
• wedding_invitation,
• meeting_agenda,
• informal_publication,
• flagstaff,
• latex,
• map,
• happiness,
• proposal,
• manufacturer_instructions,
• string,
• dictionary,
• hair_color,
• trade_show,
• wood,
• training_package,
• carpet_fluff,
• personal_correspondence,
• charcoal,
• sound,
• government_information,
• fiber,
• street_furniture,
• meteor,
• stone,
• celebrity_news,
• coconut_leaf,
• road_closure,
• cigarette,
• acceptance,
• culinary_spice,
• electronic_mail,
• earth,
• sheet,
• race_condition,
• speech,
• air,
• theatre,
• snow_rabbit,
• smell,
• scarcity,
• leaflet,
• lightning,
• reminder,
• beacon,
• hair,
• calendar,
• poster,
• seed,
• log,
• minutes,
• conference-room_papers,
• stock_price,
• occultation,
• clay,
• paper,
• chocolate,
• building_shadow,
• old_document,
• paperback,
• wall_chart,